/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.io.kinesis;



import java.util.List;



import static com.bff.gaia.unified.vendor.guava.com.google.common.collect.Lists.newArrayList;



/**

 * Filters out records, which were already processed and checkpointed.

 *

 * <p>We need this step, because we can get iterators from Kinesis only with "sequenceNumber"

 * accuracy, not with "subSequenceNumber" accuracy.

 */

class RecordFilter {



  public List<KinesisRecord> apply(List<KinesisRecord> records, ShardCheckpoint checkpoint) {

    List<KinesisRecord> filteredRecords = newArrayList();

    for (KinesisRecord record : records) {

      if (checkpoint.isBeforeOrAt(record)) {

        filteredRecords.add(record);

      }

    }

    return filteredRecords;

  }

}